Answer:
Kate's sister is 5
Step-by-step explanation:
(k = kate's age)
(s = sister's age)
k = s + 3
k + 2 = 2s
Rearrange k + 2 = 2s into and plug it into the first equation
k = 2s - 2
2s - 2 = s + 3
2s - s = 3 + 2
s = 5
20 divided by 5 is 4
20 divided by 5 = 4
Answer:
w = 19/15 or 1 4/15
Step-by-step explanation:
11/15 = w-(8/15) // - w-(8/15)
11/15-w+8/15 = 0
19/15-w = 0 // - 19/15
-w = -19/15 // * -1
w = 19/15
w = 19/15
Answer:
26 inches
Step-by-step explanation:
The bike tire moves 136 feet in 20 revolutions.
The tire is shaped as a circle. 1 revolution is equivalent to going round the circumference 1 time, hence, the circumference of the bike tire is:
136/20 = 6.8 feet
The circumference of a circle is given as:
C = πD
=> D = C / π
Therefore, the diameter of the bike tire is:
D = 6.8 / 3.14 = 2.17 feet
To convert to inches:
1 feet = 12 inches
2.17 feet = 2.17 * 12 = 26.04 inches ≅ 26 inches